Sharpener



June 12, 1934. G woop 1,962,755

SHARPBNER Original Filed Jan. 22, 1930 .i llul lnf INVENTOR Giddy/4mm;

ATTORNEY attached t Patented June 12, 1934 UNITED STATES SHARPENER George R. Wood,

signor, by mesne Business Machi N. Y., a corpora Original application Jan 422,564. Divided and bar 1, 1930, Serial No.

3 Claims.

This case relates to slicing machines and is a division of my application Serial No. 422,564, filed January 22, 1930.

The object of the instant case is to provide an improved means for associating a knife sharpener with the knife.

Various other objects and advantages of my invention will be obvious from the following particular description of one form of mechanism embodying the invention or from an inspection of the accompanying drawing; and the invention also constitutes certain new and novel features of construction and combination of parts hereinafter set forth and claimed.

In the drawing:

Fig. 1 is a front view of the feeding side of the machine.

Fig. 2 is a detail of the sharpening device, and Fig. 3 is a detail partly in section of the sharpner and adjacent knife portions.

In detail, the machine comprises a base carrying the motor 11 for driving knife 12 located inside housing 13. The motor drives the knife through a belt 14 passing over a pulley 15 o the knife. The pulley is rotatably mounted in housing 13. The feed side of the knife is covered by a guard plate 16 parallel to a gage plate 17, both guard and gage plates being carried by the top frame 18 attached to housing 13. The base is provided on the feed side with rails 19 and 20 for guiding the article holding carriage 21 for movement towards the knife edge and parallel to the gage and guard plates.

The side of the housing 13 opposite the guard plate is integrally formed with internally threaded bosses 22 extending inside the housing. Rotatable in one boss is a threaded sleeve 24 and in the other a threaded sleeve 25. Each sleeve has an operating knob 26. Journalled in sleeve 24, is the shaft 27 of a grindstone 28 constrained to move longitudinally with the sleeve. Similarly, a steel disk 29 for removing the burr of the knife after grinding is journalled in sleeve 25 (see Fig. 3).

In order to efficiently sharpen the knife, it is necessary that the grindstone be kept clean. If left exposed, the stone becomes coated with grease. food particles, or the like, cast off by the knife during the cutting operations. To prevent this, the grindstone is completely enclosed when not in use. The enclosing means comprises a casing 30 (see Fig. 2) fixed to the forward face of boss 22 and open at the front to permit egress and ingress of the stone. When the stone is 55- within the casing, the opening in the latter is Toronto, Ontario, Canada, as-

assignments, to- International nes Corporation, New. York, tion of New York uary 22, 1930, Serial No. this application Decemclosed by a cover 31, which is carried by one end of a shaft 32 Journalled in the boss 22 and extending to the outside, where a finger knob 33 is fixed to the shaft for manipulating it. The shaft is fixed to the cover at a point adjacent the periphery thereof so that when the knob 33 is given a half turn, it completely displaces the cover 31 to one side of the opening in the casing, a rib 37 formed interiorly on the housing 13 (Fig. 1) serving to support the cover in open position. By giving theknob 33 a half turn in the reverse direction, the cover is replaced in closing position, in which position it is stopped and retained by a lug 34 formed on the periphery of the cover and seating in a notch 35 in the easing 30.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims.

I claim: 1. In a slicing machine in which a rotatable knife is provided for slicing food articles; the combination of a grindstone movable into and out of sharpening engagement with the knife, a housing containing therein the grindstone and fixed in position relative to the knife, a shield for masking the grindstone from the knife when the grindstone is out of sharpening engagement with the knife, and means for moving the shield into or out of masking position with respect to the grindstone without disturbing said fixed po' sition of the grindstone housing relative to the knife.

2. In a food slicer i knife and a housing f the combination of nalled at one end in ing and normally ina housing, the grindsto opposite the end at n which a rotary slicing or the latter is provided; a rotary grindstone jourthe interior of said housccessible from without the ne having a grinding face which it is journalled for engaging and sharpening the knife, said engagement effecting rotation of the grindstone during the sharpening operation, means for moving the grindstone axially to engage said face with the knife, a shield for completely shielding said face of the grindstone from the knife when the grindstone is retracted and out of sharpening engagement to prevent matter thrown off by the knife ported thereby,

during the sharpening operation, means for moving the grindstone axially into and out of grinding cooperation with the knife edge, a shield for completely masking said grinding face from the knife when the grindstone is disengaged from and out of cooperation with the knife, a member passing through the housing and supone end of said member projecting into the interior of the housing and rigidly secured to said shield, the other end of said member projecting exteriorly of the housing and operable to move the shield into and out of masking cooperation with the grindstone.

GEORGE R. WOOD. 

